ASTM D4552-92(1999)

Standard Practice for Classifying Hot-Mix Recycling Agents

SCOPE
1.1 This practice covers a standardized method whereby petroleum product additives to be used in hot recycling of asphalt concrete can be identified. The products are classified by viscosity in centistokes measured at 140°F (60°C). This practice does not apply to emulsified materials.  
1.2 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Feb-1999
• ICS: 93.080.10 - Road construction
• Technical Committee: D04 - Road and Paving Materials
• Drafting Committee: D04.40 - Asphalt Specifications

Relations

• Replaced By: ASTM D4552-92(2004) - Standard Practice for Classifying Hot-Mix Recycling Agents
• Effective Date: 01-Jul-2004
• Referred By: ASTM D8-22a - Standard Terminology Relating to Materials for Roads and Pavements
• Effective Date: 10-Feb-1999

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 4552 – 92 (Reapproved 1999)
Standard Practice for
Classifying Hot-Mix Recycling Agents
This standard is issued under the fixed designation D 4552; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Significance and Use
1.1 This practice covers a standardized method whereby 3.1 Recycling of deteriorated asphalt pavements is being
petroleum product additives to be used in hot recycling of used with increasing frequency for its economy and benefit of
asphalt concrete can be identified. The products are classified conserving raw materials. The objective of recycling is to reuse
by viscosity in centistokes measured at 140°F (60°C). This the two ingredients of asphalt concrete-aggregate and asphalt
practice does not apply to emulsified materials. and to restore the desired properties to the mixture. Recycling
1.2 This standard does not purport to address all of the is carried out hot or cold, depending on the condition of the
safety problems, if any, associated with its use. It is the deteriorated pavement, construction procedure, availability of
responsibility of the user of this standard to establish appro- equipment, and cost. This practice is for classifying recycling
priate safety and health practices and determine the applica- agents to be used in hot recycling.
bility of regulatory limitations prior to use.
4. Classification
2. Referenced Documents
4.1 This practice describes recycling agents (RA) as belong-
2.1 ASTM Standards: ing to one of the following six groups: RA 1, RA 5, RA 25, RA
D 70 Test Method for Specific Gravity and Density of 75, RA 250, or RA 500, as shown in Table 1. The viscosity
Semi-Solid Bituminous Materials ranges are designed to avoid overlap and to provide sufficient
D 92 Test Method for Flash and Fire Points by Cleveland flexibility to satisfy a wide range of mix proportions. Other
Open Cup properties specified include flash point (handling), weight
D 140 Practice for Sampling Bituminous Materials percent of saturates (compatibility), selected properties of the
D 946 Specification for Penetration-Graded Asphalt Ce- RTF or TF oven residue (durability), and specific gravity.
ment for Use in Pavement Construction 4.2 The choice of RA grade will depend on the amount and
D 1298 Test Method for Density, Relative Density (Specific hardness of the asphalt in the aged pavement. In general, the
Gravity), or API Gravity of Crude Petroleum and Liquid lower viscosity RA types can be used to restore aged asphalts
Petroleum Products by Hydrometer Method of high viscosity and vice versa. Additionally, grades RA 1, RA
D 1754 Test Method for Effect of Heat and Air on Asphaltic 5, RA 25, and RA 75 will generally be most appropriate for
Materials (Thin-Film Oven Test) hot-mix recycling of salvaged asphalt concrete when no more
D 2007 Test Method for Characteristic Groups in Rubber than 30 % virgin aggregate is added, while grades RA 250 and
Extender and Processing Oils by the Clay Gel Adsorption RA 500 will generally be most appropriate when more than
Chromatographic Method 30 % virgin aggregate is incorporated into the mix.
D 2170 Test Method for Kinematic Viscosity of Asphalts
2 5. Physical Properties
(Bitumens)
5.1 All recycling agents must be homogeneous, free-
D 2171 Test Method for Viscosity of Asphalts
...